What should I do about my childrens incest?

Please give me actual advise, I'm not a troll. I've been crying and freaking out and all these posts calling me a troll and telling me to go away aren't helping! My daughter is 20, my son is 19. We live in New Jersey and they told me that incest is legal here and showed me the research they did on it. I'm so conflicted because they tell me they love each other, but my mind sees it as wrong. I'm posting this as anonymous because I feel embarrassed and ashamed. Please, stop judging and give me some actual advise.